<div dir="ltr"><div>For "
I dont
know what MPEG codec is it, at what mbit/s speed" you may check this:</div><div><a href="https://lists.bufferbloat.net/pipermail/starlink/2024-April/002706.html">https://lists.bufferbloat.net/pipermail/starlink/2024-April/002706.html</a>
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From: Alexandre Petrescu <<a href="mailto:alexandre.petrescu@gmail.com" target="_blank">alexandre.petrescu@gmail.com</a>></div>
To: Frantisek Borsik <<a href="mailto:frantisek.borsik@gmail.com" target="_blank">frantisek.borsik@gmail.com</a>>, Colin_Higbie<br>
<<a href="mailto:CHigbie1@higbie.name" target="_blank">CHigbie1@higbie.name</a>><br>
Cc: "<a href="mailto:starlink@lists.bufferbloat.net" target="_blank">starlink@lists.bufferbloat.net</a>" <<a href="mailto:starlink@lists.bufferbloat.net" target="_blank">starlink@lists.bufferbloat.net</a>><br>
Subject: Re: [Starlink] It’s the Latency, FCC<br>
Message-ID: <<a href="mailto:298126c9-7854-47c5-a965-c0f89a855939@gmail.com" target="_blank">298126c9-7854-47c5-a965-c0f89a855939@gmail.com</a>><br>
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Le 02/05/2024 à 21:50, Frantisek Borsik a écrit :<br>
> Thanks, Colin. This was just another great read on video (and audio - <br>
> in the past emails from you) bullet-proofing for the near future.<br>
><br>
> To be honest, the consensus on the bandwidth overall in the <br>
> bufferbloat related circles was in the 25/3 - 100/20 ballpark<br>
<br>
<br>
To continue on this discussion of 25mbit/s (mbyte/s ?) of 4k, and 8k, <br>
here are some more thoughts:<br>
<br>
- about 25mbit/s bw needs for 4K: hdmi cables for 4K HDR10 (high <br>
dynamic range) are specified at 18gbit/s and not 25mbit/s (mbyte?). <br>
These HDMI cables dont run IP. But, supposedly, the displayed 4K image <br>
is of a higher quality if played over hdmi (presumably from a player) <br>
than from a server remote on the Internet. To achieve parity, maybe <br>
one wants to run that hdmi flow from the server with IP, and at that <br>
point the bandwidth requirement is higher than 25mbit/s. This goes hand <br>
in hand with the disc evolutions (triple-layer bluray discs of 120Gbyte <br>
capacity is the most recent; I dont see signs of that to slow).<br>
<br>
- in some regions, the terrestrial DVB (TV on radio frequencies, with <br>
antenna receivers, not IP) run at 4K HDR10 starting this year. I dont <br>
know what MPEG codec is it, at what mbit/s speed. But it is not over the <br>
Internet. This means that probably ISPs are inclined to do more than <br>
that 4K over the Internet, maybe 8K, to distinguish their service from <br>
DVB. The audience of these DVB streams is very wide, with cheap <br>
one-time buy receivers (no subscription, like with ISP) already widely <br>
available in electronics stores.
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